Rear portion of an automobile



FIG. 1 is a front perspective view of a rear portion of an automobile showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof, the left side view being a mirror image thereof; and,

FIG. 6 is a top plan view thereof.

The bottom view of the rear portion of the automobile forms no part of the claimed design. 

CLAIM The ornamental design for a rear portion of an automobile, as shown and described. 